An Integrated Converter for Electric Vehicle Charging Using Grid and Solar Power with Minimal Components

This work proposes a novel integrated converter for Electric Vehicles (EVs) chargers. The proposed converter system allows a solar photovoltaic (PV) system and utility grid to be deployed in tandem for battery-charging operations. The devised charging system has fewer components because both sources use the same flyback converter and work as an integrated converter. A modified bridgeless (BL) single-ended primary-inductor converter (SEPIC) is used for grid power. It offers an EV charging option that is both inexpensive and has a high-power density. The charger's efficiency is increased since it uses fewer devices to operate during a switching cycle. This lowers the additional conduction loss that a typical charger's diode bridge rectifier would otherwise experience. A flyback converter synchronizes the commands for charging batteries during periods of constant voltage and constant current for solar power and grid power. Utilizing solar power and AC mains, the proposed charger is built in discontinuous conduction mode (DCM) and has low reverse recovery losses in circuit diodes, as well as the ideal inherent zero current switching operation. MATLAB/Simulation platform is used here to assess the enhanced performance of the modified BL SEPIC EV charger with grid and solar power.